According to a blog post over at google they have added a social bar to the popular friend connect application.
With the social bar, your visitors will be able to see crucial info at a glance and engage with social features through convenient drop-down gadgets.
On the far left, visitors can join your site, see their identity, and edit their profiles and settings.
Your visitors can also delve into your site's activity stream to see what's happening throughout your site. It includes links to recent posts made anywhere on your site, helping other visitors quickly find where the hottest conversations are taking place.
The wall gadget can host a discussion for the whole site, a section of pages, or each individual page, letting your visitors easily read and leave comments.
Lastly, visitors can see the other members of your site, check out their profiles to see how like-minded they really are, and even become friends.